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1959 Map of Mount St. Helena

Name: 1959 Topographic Map of Mount St. Helena
Creator: U.S. Geological Survey
Published: 1978
License: https://creativecommons.org/publicdomain/mark/1.0/

USGS Topo · Published 1978

About this map

Chicago Mine, Helen Mine, and the Wall Street Mine dot the northern slopes of the Mayacmas Mountains, marking a region defined by mid-century resource extraction and rugged terrain. This late 1950s record captures the remote character of the borderlands between Sonoma, Lake, and Napa Counties, where the high point of Mount St Helena dominates the landscape.

In the lower elevations, the Knights Valley and the land grant of Mallacomes or Moristul show a sparse network of mountain roads like Franz Valley Rd and small outposts such as Locke Cabin and Bacon Flat. The presence of the Sheveland Rancheria near the Collayomi Valley and a local Fish Hatchery reflects the diverse land use in these coastal ranges before modern expansion. This survey preserves the locations of early mercury mining operations and the isolated settlements that once supported them.